An animated movie

So this movie has a son and a father on a ship. Then they get into a shipwreck and end up under the water. Then as the son goes under, debris from the ship covers him and he's at the bottom of the ocean or sea or wherever he is. Then he blacks out and he has a dream or whatever and he gets a second wind and pushes the debris off of him. Then he swims back up to the surface. I dont remember what happens after but I really would like the movie thooo plzzzzz